Cross-platform AirDrop. File transfer between Android, iOS, Linux, macOS, and Windows over ad hoc WiFi. No network infrastructure required, just two devices with WiFi chips (and optionally Bluetooth) in close range.
Unofficial Python BLE client for the Renpho ES-CS20M smart fitness scale. Streams weight and body fat, derives nine body-composition metrics, supports async user-detection mode.
Zero-dependency Web Bluetooth driver + reverse-engineered protocol docs to print Niimbot label printers straight from the browser — no app. Validated on B1, B1 Pro, B2 Pro, M2-H, D11_H, D110 and N1.